Air Bubbles In Sight Glass

[wscheffer]

Hello everyone,

This may sound stupid but I am in the process of charging my A/C system on my 1987 420 SEL and noticed that there are bubbles in the sight glass. I know that this is not normal but does this mean I need to add more Freon to the system?

 

[Uncle Benz]

I am not an A/C expert, but I think bubbles are not a problem. It is normal for what my A/C man decribes as 'frothy coffee' to be passing through the sight glass. If you are talking about large 'gaps' of air going through, followed by fluid this will be a problem. Hope this helps.

 

[jibcl500]

when there are no bubbles thats when theres a problem!!!!!

jib

 

[wscheffer]

Thanks everyone for your reply I guess I'll just sit back and enjoy the ride!

 

[eric242340]

Thanks everyone for your reply I guess I'll just sit back and enjoy the ride!

When air can be seen in the system, it doesent mean much. as long as the air con is cool dont worry too much.b b

 

[Andy Wr]

Dont add more gas if you see bubbles, if in doubt remove the old gas and weigh in a fresh charge, overcharged can do as much damage as under charged.